학술논문
Photochemical Degradation of Disazo Dyes, R-Salt Derivatives, on Dyed Cotton
Document Type
article
Source
Journal of Natural Fibers, Vol 14, Iss 3, Pp 346-356 (2017)
Subject
Language
English
ISSN
1544-0478
1544-046X
15440478
1544-046X
15440478
Abstract
Direct disazo dyes, R-salt derivatives, were synthesized and examined. The dyes were prepared by coupling of appropriate components with tetrazotized diacyl derivatives of aromatic diamines. Derivatives of dicarboxylic acids with the general formula HOOC―(CH2)n―COOH (n = 0 ÷ 4) were used as acylating agents. Photochemical degradation rates of dyes on dyed cotton fabric were studied. Compositions of azo-hydrazone tautomers, their aggregates, and their decay rates in UV-Vis light were determined. It was assumed that the length of aliphatic chain in the molecule affects the rate of its photochemical degradation T1/2, tautomeric composition, and dyes aggregation in azo and hydrazo forms.